I always found entering written information or transcribing music into the computer a cumbersome process. With the paper flat on the desk, it was at the wrong angle. On a music stand beside the desk, I had to turn my head all the time. Either way led to frequent loss of my place, neck strain and frustration.
This stand improves matters greatly. I set the written material on it next to the computer monitor, so head movements are minimal, and it's easier to keep my place. The tasks get done quicker, more accurately, with less neck strain and frustration. Happy days.
It won't support thick books so well, but no big deal. If it's a problem I just use photocopies of the relevant pages.